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The recommended setting of C/k can be calculated by the following formula or can be
read directly in the table below.
Formula
Three phase network
CT ratio
K
10/1
50/5
10
20/1
100/5
20
30/1
150/5
30
40/1
200/5
40
60/1
300/5
60
80/1
400/5
80
100/1
500/5
100
120/1
600/5
120
160/1
800/5
160
200/1
1000/5
200
300/1
1500/5
300
400/1
2000/5
400
600/1
3000/5
600
Note:
For RVT12-3P, two C/k are available: C/k 1ph and C/k 3ph; RVT6/RVT12 has only C/k
available.
C/k 3ph (or C/k) is applicable for installation with one, two or three CT (three phase
balanced network); C/k 1ph is applicable for installation with three CTs (unbalanced
three phase network). It is assumed that, for an unbalanced three phase network, a
uniform C/k 1ph is used for three individual single phase capacitor switching.
It is assumed that all CTs connected to RVT12-3P (two or three CTs under different
connection types) have the same ratio. However, the minimal step for single phase
capacitor and three phase capacitor could be different; this entails two different C/k
values for RVT.
Phase shift (applicable to base model only): phase shift between voltage and current
introduced by the measurement connection.
If the RVT is connected as shown on the connection diagram described in paragraph 2.4,
the phase shift value is 90° (default setting).
Table 2: C/k table for a 3-phase balanced 400V system
Capacitor step rating (kvar)
5
10
15
20
0.48
0.97
1.45
1.93
0.24
0.48
0.73
0.97
0.16
0.32
0.48
0.64
0.12
0.24
0.36
0.48
0.08
0.16
0.24
0.32
0.06
0.12
0.12
0.24
0.05
0.10
0.15
0.19
0.04
0.08
0.12
0.16
0.03
0.06
0.09
0.12
0.02
0.05
0.07
0.10
0.02
0.03
0.05
0.06
0.01
0.02
0.04
0.05
0.01
0.02
0.02
0.03
Single phase (L-L or L-N) network
30
40
50
60
2.90
3.87
4.84
1.45
1.93
2.42
2.90
0.97
1.29
1.61
1.93
0.73
0.97
1.21
1.45
0.48
0.64
0.81
0.97
0.36
0.48
0.60
0.73
0.29
0.39
0.48
0.58
0.24
0.32
0.40
0.48
0.18
0.24
0.30
0.36
0.15
0.19
0.24
0.29
0.10
0.13
0.16
0.19
0.07
0.10
0.12
0.15
0.05
0.06
0.08
0.10
Power Factor Controller RVT ç Measurements and Settings 45
70
90
100
120
3.38
4.35
4.84
2.26
2.90
3.22
3.87
1.69
2.18
2.42
2.90
1.13
1.45
1.61
1.93
0.85
1.09
1.21
1.45
0.68
0.87
0.97
1.16
0.56
0.73
0.81
0.97
0.42
0.54
0.60
0.73
0.34
0.44
0.48
0.58
0.23
0.29
0.30
0.39
0.17
0.22
0.23
0.29
0.11
0.15
0.15
0.19
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